5643666356 has 6 divisors (see below), whose sum is σ = 9876416130. Its totient is φ = 2821833176.

The previous prime is 5643666323. The next prime is 5643666367. The reversal of 5643666356 is 6536663465.

It can be written as a sum of positive squares in only one way, i.e., 4531443856 + 1112222500 = 67316^2 + 33350^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 705458291 + ... + 705458298.

It is an arithmetic number, because the mean of its divisors is an integer number (1646069355).

Almost surely, 2^5643666356 is an apocalyptic number.

It is an amenable number.

5643666356 is a deficient number, since it is larger than the sum of its proper divisors (4232749774).

5643666356 is a wasteful number, since it uses less digits than its factorization.

5643666356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1410916593 (or 1410916591 counting only the distinct ones).

The product of its digits is 6998400, while the sum is 50.

The square root of 5643666356 is about 75124.3393049150. The cubic root of 5643666356 is about 1780.4117168227.

The spelling of 5643666356 in words is "five billion, six hundred forty-three million, six hundred sixty-six thousand, three hundred fifty-six".